Could You Use a Two-Screen Laptop?

Earlier today, I got a glimpse of Lenovo's new laptop, the ThinkPad w700 DS, which has a second screen that pulls out of the main screen. It's a behemoth--large enough to look like a desktop at first glance. But it is, indeed, a notebook and Lenovo is hoping it will appeal to engineers, architects, multimedia designers, and accountants--anyone who needs a lot of computing power and a lot of screen space, and also spends a lot of time on the road. Take a look at the video below, and let us know what you think. Does this seem like something you could use?